WO2020028212A1 - Chargeur de batterie - Google Patents

Chargeur de batterie Download PDF

Info

Publication number
WO2020028212A1
WO2020028212A1 PCT/US2019/043845 US2019043845W WO2020028212A1 WO 2020028212 A1 WO2020028212 A1 WO 2020028212A1 US 2019043845 W US2019043845 W US 2019043845W WO 2020028212 A1 WO2020028212 A1 WO 2020028212A1
Authority
WO
WIPO (PCT)
Prior art keywords
charger
battery
housing
heat sink
fan
Prior art date
Application number
PCT/US2019/043845
Other languages
English (en)
Inventor
Wyatt R. Silha
Donald J. Truettner
John G. Marx
Cameron R. Schulz
Original Assignee
Milwaukee Electric Tool Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Milwaukee Electric Tool Corporation filed Critical Milwaukee Electric Tool Corporation
Priority to AU2019314293A priority Critical patent/AU2019314293B2/en
Priority to CN201980050957.8A priority patent/CN112514197A/zh
Priority to EP19844766.6A priority patent/EP3830925A4/fr
Publication of WO2020028212A1 publication Critical patent/WO2020028212A1/fr
Priority to AU2022203040A priority patent/AU2022203040B2/en
Priority to AU2023203101A priority patent/AU2023203101B2/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with provisions for charging different types of batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H02J7/0049—Detection of fully charged condition
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20945—Thermal management, e.g. inverter temperature control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure relates to battery chargers and, more particularly, to cooling a batery charger.
  • a batery charger in one independent embodiment, includes a housing having support structure for simultaneously supporting at least two bateries of different types for charging including a first battery of a first type and a second battery of a second type.
  • the support structure defines a channel configured to receive a projection of the first battery ' .
  • At least a portion of the support structure includes a plastic material molded to define tire channel, and a metal material molded in the plastic material.
  • the battery charger further includes charger electronics supported by the housing and operable to output charging current to charge the first battery' and charging current to charge the second battery'.
  • a fan is operable to cause air flow through the housing.
  • a fan speed of the fan is adjustable based on a temperature of the battery charger (i) while at least one of the at least two batteries is coupled to the battery' charger for charging and (ii) while no batteries are coupled to the batery' charger for charging.
  • An indicator is positioned on the housing and operable to indicate an operation of the batery charger.
  • the indicator includes a light pipe for illuminating the indicator.
  • a battery charger in another independent embodiment, includes a housing having support structure for simultaneously supporting at least two batteries of different types for charging including a first battery' of a first type and a second battery of a second type.
  • the batery charger further includes charger electronics supported by the housing and operable to output charging current to charge the first battery ' and charging current to charge the second battery.
  • a fan is operable to cause air flow through the housing.
  • a fan speed of the fan is adjustable based on a temperature of the battery' charger (i) while at least one of the at least two batteries is coupled to the batter ' charger for charging and (ii) while no batteries are coupled to the battery charger for charging.
  • An indicator is positioned on the housing and operable to indicate an operation of the battery' charger. The indicator includes a light pipe for illuminating the indicator.
  • a battery charger includes a housing having support structure for simultaneously supporting at least two batteries of different types for charging including a first battery of a first type and a second battery of a second type.
  • the battery charger further includes charger electronics supported by the housing and operable to output charging current to charge the first battery and charging current to charge the second battery.
  • a fan is operable to cause air flow through the housing.
  • a fan speed of the fan is adjustable based on a temperature of the battery charger (i) while at least one of the at least two batteries is coupled to the battery charger for charging and (ii) while no bateries are coupled to the battery' charger for charging.
  • a battery charger may generally include a housing defining an air inlet and an air outlet; charger electronics positioned within the housing; a tubular heat sink operable to dissipate heat in the charger; a fan operable to cause air flow from the inlet to the outlet and along the heat sink; and a diverter integral with and extending within the housing, the diverter being configured to facilitate the air flow from the air inlet to the air outlet.
  • the diverter may be configured to create turbulent air flow within the housing.
  • the diverter extends from a top of the housing.
  • the housing may include a diverter extending from a botom of the housing, the diverter being configured to direct air along a bottom of and/or through the charger electronics.
  • the fan may' be between an end of the heat sink and the air outlet.
  • a baffle may be connected between the end of the heat sink and the fan.
  • a battery charger may generally include a housing defining an air inlet positioned on a first side of the housing and an air outlet positioned on an opposite second side of the housing; charger electronics positioned within the housing; a tubular heat sink operable to dissipate heat in the charger; and a fan operable to cause air flow from the inlet to the outlet and along the heat sink.
  • the first side may be a front of the housing, and the second side may he a back of the housing such that the second side may be opposite the first side.
  • the first side may be a front of the housing, and the second side may be adjacent and oriented about 90 degrees relative to the first side.
  • the air inlet may be positioned proximate a battery couplable to the charger; however, air flow may not enter or exit the batter ' before or after flowing through the housing of the charger.
  • the battery charger may further include a second air inlet positioned on a third side of the housing.
  • the third air inlet may be configured to direct air flow along a botom of the charger electronics.
  • the charger electronics may include a second heat sink for dissipating heat from components of the charger electronics to the bottom of the charger electronics.
  • the tubular heat sink may include a slot for directing the air flow from the heat sink over a component of the charger electronics.
  • a batery charger may generally include a housing having support structure for supporting at least two different types of batteries for charging; charger electronics operable to output a charging current to charge a supported batery; and a fan operable to cause air flow through the housing.
  • a fan speed may be adjusted based on a temperature of the charger regardless if one of the batteries is coupled to the charger.
  • a battery charger may generally include a housing having support structure for supporting different types of batteries for charging; charger electronics operable to output a charging current to charge a supported batery; and an indicator positioned on the housing and operable to indicate an operation of the charger, the indicator including a light pipe for illuminating the indicator.
  • a battery charger may generally include a housing including a support portion connectable to and operable to support a battery' pack, the support portion defining a channel operable to receive a projection on the battery pack, the support portion including a plastic material molded to define the channel, and a metal material molded in the plastic material; a charging circuit supported by the housing; and a charger terminal electrically connected to the charging circuit and connectable to a terminal of the batery pack.
  • FIG. i is a perspective view of a batten ' charger supporting different types of batteries for charging.
  • FIG. 2 is a perspective view of an alternative construction of a battery charger for charging different types of batteries.
  • FIG. 3 is a top view of the battery charger of FIG. 2.
  • FIG. 4 is a bottom perspective of the batten ' charger of FIG 2.
  • FIG. 5 is a botom perspective view of an upper housing of the batten' charger of
  • FIG. 6 is a top perspective view' of the battery charger of FIG. 2, with portions of the housing removed, and illustrating a first embodiment of a heat sink assembly.
  • FIG. 7 is another top perspective view' of the battery charger of FIG. 2, with portions of the housing removed.
  • FIG. 8A is a schematic diagram illustrating electronics of the batteiy charger of FIG. 2.
  • FIG. 8B is a flow' chart illustrating a method of operating the batery charger of
  • FIG. 9 is a top perspective view of the batery charger of FIG. 2, with portions of a housing shown as transparent and illustrating an airflow patern through the housing.
  • FIG. 10A is a cross-sectional view ' of a battery supporting portion of the batery ' charger of FIG. 2.
  • FIG. 10B is an enlarged top view' of a portion of the battery supporting portion of the battery ' charger showm in FIG 10 A.
  • FIG. 11 is a perspective view of another alternative construction of a batery charger, with portions of the housing removed, and illustrating a second embodiment of a heat sink assembly .
  • FIG. 12A is a perspective of a first heat sink of the heat sink assembly of FIG. 11.
  • FIG. 12B is a perspective view of a second heat sink of the heat sink assembly of FIG. 11.
  • FIG. 13A is a perspective view of another embodiment of a heat sink of the heat sink assembly of FIG. 11.
  • FIG. I3B is a perspective view' of yet another embodiment of a heat sink of the heat sink assembly of FIG. 11.
  • FIG. 14 is a top view of yet another alternative construction of a battery charger, w'ith portions of a housing removed and illustrating an airflow pattern through the housing.
  • FIG. 15 is a top perspective view of a portion of the battery charger of FIG. 14, with portions of the housing removed and illustrating a third embodiment of a heat sink assembly.
  • FIG. 16 is a top perspective view of another portion of the battery charger of FIG. 14, with portions of the housing removed.
  • FIG. 17A is a perspective view' of a first heat sink of the heat sink assembly of FIG. 15.
  • FIG. I7B is a side view of the first heat sink of FIG. G7A.
  • FIG. 17C is a side view' of another embodiment of the first heat sink of FIG. 17A
  • FIG. I8A is a perspective view' of a second heat sink of the heat sink assembly of
  • FIG. 18B is a side view' of the second heat sink of FIG. 18A.
  • FIG. 18C is a side view' of another embodiment of the second heat sink of FIG.
  • functionality described herein as being performed by one component may be performed by multiple components in a distributed manner. Likewise, functionality' performed by multiple components may be consolidated and performed by a single component. Similarly, a component described as performing particular functionality may also perform additional functionality ' not described herein. For example, a device or structure that is“configured” in a certain way is configured in at least that way but may also be configured in w'ays that are not listed.
  • embodiments described herein may include one or more electronic processors configured to perform the described functionality by executing instructions stored in non-transitory, computer-readable medium.
  • embodiments described herein may be implemented as non-transitory, computer-readable medium storing instructions executable by one or more electronic processors to perform the described functionality.
  • “non-transitory computer-readable medium” comprises all computer-readable media but does not consist of a transitory, propagating signal.
  • non-transitory computer-readable medium may include, for example, a hard disk, a CD-ROM, an optical storage device, a magnetic storage device, a ROM (Read Only Memory), a RAM (Random Access Memory), register memory, a processor cache, or any combination thereof.
  • modules and logical structures described are capable of being implemented in software executed by a microprocessor or a similar device or of being implemented in hardware using a variety of components including, for example, application specific integrated circuits (“ASICs”).
  • ASICs application specific integrated circuits
  • Terms like“controller” and“module” may include or refer to both hardware and/or software.
  • Capitalized terms conform to common practices and help correlate the description with the coding examples, equations, and/or drawings.
  • FIG. I illustrates a battery charger 10 operable to charge a battery 14 A, 14B coupled to the charger 10.
  • the battery charger 10 is operable to charge a first battery 14A of a first type and a second battery 14B of a second type.
  • the illustrated battery charger 10 may be operable to charge a high output batery (e.g., having a current capacity of 12 amp-hours (Ah) or more), which requires about 3 times the power of typical chargers, in about 60 minutes.
  • a high output batery e.g., having a current capacity of 12 amp-hours (Ah) or more
  • the battery type may be defined by nominal voltage, current capacity, connection configuration (e.g.,“tower” vs.“slide-on”, or two different slide-on interfaces), etc., of the battery 14A, 14B.
  • the first battery 14A may include a high-power battery pack with a nominal voltage of about 12 volts (V) and having a tower-style configuration
  • the second battery 14A may include a high-power battery 7 pack with a nominal voltage of 18V and a slide-on configuration.
  • the batteries 14A, 14B may be the same type of battery.
  • Each battery 14A, 14B is connectable to and operable to power various motorized power tools (e.g., a cut-off saw, a miter saw, a table saw', a core drill, an auger, a breaker, a demolition hammer, a compactor, a vibrator, a compressor, a drain cleaner, a welder, a cable tugger, a pump, etc.), outdoor tools (e.g., a chain saw , a string trimmer, a hedge trimmer, a blower, a lawn mower, etc.), other motorized devices (e.g., vehicles, utility carts, a material handling cart, etc.), and non-motorized electrical devices (e.g., a power supply, a light, an AC/DC adapter, a generator, etc.).
  • motorized power tools e.g., a cut-off saw, a miter saw, a table saw', a core drill, an auger, a breaker, a demolition
  • the charger 10 includes a housing 18 providing support structure 22A, 22B (FIG. 2 ⁇ engageable with the respective batteries 14.4, I4B, a power input port 26 for connection to a power supply (e.g., through a power cord 30), charger electronics 34 (FIG. 6), and a heat dissipating structure 38.
  • Air flow e.g., curvilinear lines; FIG. 9) is configured to flow though the housing 18 for dissipating heat generated by the charger 10.
  • the charger housing 18 has a top portion 42A and an opposite bottom portion 42B coupled to the top portion 42A (e.g., by fasteners (not shown)).
  • the housing portions 42 A, 42B may be formed of plastic with each molded as a single piece.
  • the top portion 42A has a top wall 46, a lower wall 48, and an inclined wall 50 coupled between the walls 46, 48.
  • the top wall 46 is spaced from a bottom surface 51 (FIG. 4) of the bottom portion 42B, and the lower wall 48 is substantially perpendicular to the bottom surface of the bottom portion 42B.
  • the top wall 46 provides a top of the housing 18, and the bottom portion 42B (i.e., bottom surface 51) provides a bottom of the housing 18 opposite the top.
  • the inclined wall 50 and the lower wall 48 provide a front of the housing 18
  • the top portion 42A further includes a back wall 54 (FIG. 5) opposite the front and opposite side wails 56, 60 of the top portion 42A.
  • the bottom portion 42B has a raised wall 62 interfacing with one or more walls (e.g., the back wall 54, the side walls 56, 60, etc.) of the portion 42A
  • the housing 18 provides the battery support structure 22A, 22B (FIG. 2).
  • Each support structure 22A, 22B is at least partially positioned substantially on the front of the housing (e.g., on the inclined wall 50) and defines adjacent supporting sections 64A, 64B.
  • the supporting sections 64A, 64B are configured to support the batteries 14A, 14B, respectively.
  • the battery' charger 10 includes two supporting sections 64A, 64B.
  • the battery charger 10 may include one or more supporting sections for supporting one or more batteries of the same or different type, or a combination thereof
  • the illustrated supporting section 64A defines a recess 70, as a batter ⁇ )' receiving port, defined by the top wall 46 and the inclined wall 50.
  • the recess 70 is configured to receive at least a portion (e.g., the tower) of the battery 14A.
  • a first set of charger terminals 74 extend from within the housing 18 through holes into the recess 70. The charger terminals 74 are configured to electrically connect to batery terminals of the battery' 14A received in the recess 70 for charging.
  • the illustrated supporting section 64B includes rail members 80A, 80B and a charger terminal block 84.
  • the rail members 80A, 80B, and a charger terminal block 84 are connected to the illustrated supporting section 64B.
  • each channel 88A, 88B is configured to receive a portion (i.e., projection) of the batery' 14B
  • the charger terminal block 84 is positioned between the rail members 80.4, BOB and includes a second set of charger terminals 92 configured to electrically cormect to battery' terminals of the battery' 14B for charging when the battery' 14B (or portions thereof) is received in the channels 88 A, 88B.
  • Tire illustrated reinforcement member 82 is molded as a part of the housing 18 with the rail members 80A, SOB and with the supporting section 64B.
  • the illustrated reinforcement member 82 is formed as a single piece of reinforcing material, such as metal (e.g., a metal stamping), hard plastic, etc.
  • the rail members 80A, 80B are formed by a metal material molded in a plastic material in which the metal material forms the reinforcement member 82.
  • the illustrated metal material defines a C-shaped portion 89A,B around each respective channel 88A, 88B (i.e., at a cross-section of the supporting section 64B).
  • the reinforcement member 82 is formed by two or more pieces coupled together, in which at least one of the pieces has the C-shaped portion around the respective channel 88A, 88B.
  • the reinforcement member 82 includes two L-shaped portions (i.e., at a cross-section of the supporting section 64B), and does not include the 90-degree bend found at the end of the C-shaped portions illustrated in FIG. 10A.
  • the horizontal leg of the L-shape extends along the housing 18 (left- right direction, in FIG. 10A) and the vertical leg of the L-shape extends away from the housing 18 (upward, m FIG. 10A).
  • the plastic portion of the rails 80A, 80B are similarly L-shaped without the 90-degree bend shown in FIG. !OA. Additionally, in some embodiments of the charger having L-shaped rails 80.4, SOB, the vertical legs of the rails 80A, SOB oppose one another to form a channel on top of the housing 18, where the vertical legs of the rails 80A, 80B are configured to abut a battery pack (e.g., the battery pack 14B), or a portion thereof, inserted into the channel.
  • a battery pack e.g., the battery pack 14B
  • the housing 18 defines an air inlet 96 in the inclined w'all 50 and positioned below the first supporting section 64A (e.g., the recess 70). As such, the illustrated air inlet 96 is below' the batter ' 14A when coupled to the charger 10. In addition, the illustrated inlet 96 is positioned on the front of the housing 18 and includes longitudinal slots 100 defined in the inclined wall 50 and, partially, by the lower wall 48.
  • the illustrated slots 100 extend through the inclined wall 50 into an interior of the housing 18.
  • the slots 100 extend from proximate the top wall 46 to the lower wall 48.
  • the slots 100 are configured to facilitate air flow' into the housing 18.
  • the housing 18 also defines an air outlet 104 positioned on the side 56 of the housing 18 and proximate the back 54.
  • the outlet 104 includes longitudinal slots 108 defined by the side 56 and extending from proximate the bottom portion 42B to proximate the top portion 42 A (e.g., the top wail 46).
  • the slots 108 are configured to facilitate air flow exiting the housing 18.
  • the inlet 96 and the outlet 104 are positioned on different locations of the housing 18 (e.g., as illustrated, the outlet 104 is positioned on the side 56 oriented at 90 degrees relative to the front of the housing 18).
  • the housing 18 may include more than one inlet and/or outlet.
  • the housing 18 further defines a second air inlet 110 positioned on the bottom.
  • the illustrated second air inlet 110 is defined by the botom surface 51 of the bottom portion 42B.
  • the second air inlet 110 includes slots 114 proximate the front (e.g., the lower w ' all 48) and the side 56 of the housing 18.
  • the second air inlet 1 10 may facilitate air flow to a bottom side 118 (FIG. 6) of the charger electronics 34, as further discussed below .
  • first inlet 96, tiie second inlet 1 10, and/or the outlet 104 may be positioned on any side of the housing 18 (e.g., the back 54, the other side 60, the bottom, etc.).
  • the slots 100, 108, 1 14 may have the same or different lengths.
  • the illustrated siots 100 of the first inlet 96 have different lengths.
  • the illustrated slots 114, 108 of each of the second inlet 110 and the outlet 104, respectively, have the same length.
  • slots 100, 108, 114 may have any shape, such as, rectangular, triangular, trapezoidal, etc.
  • FIG. 3 illustrates the inlet 96 formed by rectangular and trapezoidal slots
  • FIG. 4 illustrates the outlet 104 being fonned by generally rectangular slots.
  • feet members 120 extend from and are configured to position the bottom portion 42B of the housing 18 at a distance (e.g., three millimeters (3 mm)) from a work surface (e.g., a table). Furthermore, the feet members 120 are configured to facilitate air flow to the second inlet 110.
  • the illustrated feet members 120 include an elastomeric material and to improve support (e.g., frictional, vibrational, etc.) of the charger 10 on the work surface.
  • die top portion 42A includes an indicia region 126 in which logos, images, brands, text, marks, etc., are displayed.
  • the illustrated indicia region 126 is positioned on the top wall 46 and above the second supporting section 64B.
  • the housing 18 may include one or more indicia regions positioned on any of the sides (e.g., top, bottom, back 54, etc.).
  • the top wall 46 may include another indicia region above the first supporting section 64 A.
  • the top portion 42A includes a plurality of openings 130 (e.g., two openings 130A, 130B) defined by the top wall 46 and positioned proximate the back 54 of the housing 18.
  • One opening 130A is positioned opposite the first supporting section 64A, and the other opening 130B is positioned opposite the second supporting section 64B.
  • the openings 130A, 130B may be configured to receive a lens 134 (only one of which is shown in FIG. 1).
  • a light source e.g., a light-emitting diode (LED), a light pipe, etc.
  • the openings 130.4, 130B and the lens 134 are configured to form indicators on tire top portion 42 A.
  • Each supporting section 64 A, 64B has an indicator for indicating an operation (e.g., charging) of the charger 10.
  • the illustrated power input port 26 is positioned on the front of the housing 18, and below the second supporting section 64B (FIG. 2). More specifically, the power input port 26 is defined in the lower wall 48. In other embodiments (not shown), the power input port 26 may he located on any side (e.g., back 54, bottom, etc. of the housing 18).
  • the illustrated power cord 30 extends from the charger electronics 34 within the housing 18 (FIG. 6) through the power input port 26 to the power source.
  • the charger electronics 34 are supported by the bottom portion 42B.
  • the charger electronics 34 are operable to output a charging current to one or both of the batteries 14A, 14B to charge the batteries 14A, 14B.
  • the charger electronics 34 include, among other things, a circuit board 140, a transformer 144, and a charger microcontroller 810.
  • the charger electronics 34 may include a charging circuit portion for each of the batteries 14A, 14B so that each battery 14A, 14B may be charged simultaneously and independently.
  • the charging current provided to each battery ' 14A, 14B may be the same or different.
  • the charger 10 further includes a heat sink 150 and a fan 154 within the housing 18 to provide the heat dissipating structure 38.
  • a temperature sensor 830 is disposed in the housing 18 and positioned near the charger electronics 34 (e.g., near the component(s) generating the most heat (e.g., the CPU, the transformer 144, field effect transistors (FETs), etc.)) or the heat sink 150. In the illustrated embodiment, the temperature sensor 830 is positioned proximate a side of the heat sink 150.
  • the temperature sensor 830 is considered“proximate” or“near” another element (e.g., the heat sink 150) when the temperature sensor 830 is within a few centimeters of the element, including when it is in direct contact with the element. Because of the proximity, the temperature sensed by the temperature sensor 830 is substantially and/or quickly influenced by changes in temperature of the proximate or nearby element.
  • FIG. 8A a schematic diagram 800 illustrating electronics of the battery' charger 10 are illustrated.
  • the charger 10 includes a power supply 805, a microcontroller 810, a first charging circuit 815, a second charging circuit 820, indicators 825, a temperature sensor 830, and the fan 154.
  • the power supply 805 includes, for example, the transformer 144 and other circuitry to rectify and condition AC power received (e.g., via an AC wall outlet) and provide DC power out to the other components of the battery' charger 10 and, ultimately, to the first and second battery packs 14A, 14B for charging.
  • the microcontroller 810 includes an electronic processor and a memory storing instructions that are executed by the electronic processor to implement the functions of the microcontroller 810 described herein.
  • the microcontroller 810 controls tire first charging circuit 815 and tire second charging circuit 820 to charge the first battery pack 14A and the second battery pack 14B, respectively.
  • the first and second charging circuits 815, 820 each include controllable power switching elements (e.g., field effect transistors, IGBTs, and the like) that the microcontroller 810 selectively enables to provide power from the power supply 805 to the respective battery packs 14A, 14B.
  • the microcontroller 810 further determines the temperature of the battery charger 10 based on an output signal from the temperature sensor 830 and drives the fan 154 according to tire determined temperature, as described in further detail below (see, e.g., FIG. 8B and corresponding description).
  • the indicators 825 are controlled by the microcontroller 810 to indicate to a user an operation of the battery charger 10, as described further below'.
  • the heat sink 150 is disposed in the housing 18 proximate the back 54. In other constructions (not shown), tire heat sink 150 may' be positioned at other locations in the housing 18 (e.g., proximate the front, the sides 56, 60, etc.).
  • the heat sink 150 is in heat transfer relationship with components of the charger electronics 34 (e.g., is mounted onto and in contact with the circuit board 140). In other words, heat transfers from the heat-generating components of the charger 10 to the heat sink 150 through conduction.
  • the heat sink 150 is formed of heat- conducting material, such as, for example, aluminum, and extends between opposite ends 158A, 158B. Furthermore, the illustrated heat sink 150 is constructed of one or more hollow tubes 162 (three are shown in FIG. 7), each having a rectangular shape and stacked above one another. The tubes 162 extend between the opposite ends 158 A, 158B. As such, the illustrated heat sink 150 forms a tubular heat sink.
  • the hollow tube(s) 162 may have another shape, such as, for example, triangular, cylindrical, etc., and the heat sink 150 may have any number of tubes 162 (e.g., one, two, more than three).
  • the charger 10 may include more than one heat sink 150.
  • the first end 158A forms an inlet of each tube 162 for air flow to enter the heat sink 150
  • the second end 158B forms an outlet of each tube 162 for air flow to exit the heat sink 150.
  • the inlet of each tube 162 is angled toward the side and the front of the housing 18.
  • the heat sink 150 is formed by a first heat sink portion 150A and a second heat sink portion 150B.
  • the first and second heat sink portions 150A, 150B are spaced apart from each other (FIG. 6).
  • a connection member 149 connects an outlet end of the first heat sink portion 150 to an inlet end of the second heat sink portion 150B.
  • the connection member 149 is configured to fluidly connect the hollow tube(s) of the heat sink portions I50A, 1 SOB
  • Tire connection member 149 may be formed of a heat sinking material, such as aluminum, but may also be formed by a non-heat sinking material, such as plastic.
  • the connection member 149 is connected to the first and second heat sink portions 150A, 150 by fasteners. Accordingly, the heat sink portions 150A, 150B and the connection member 149 may be termed as a heat sink assembly 148.
  • the heat sink 150 may be formed by a single piece such that the connection member 149 is not necessary.
  • the illustrated fan 154 is positioned between the second end 158B of the heat sink 150 and the outlet 104.
  • a baffle 166 extends between the second end 158B and the fan 154 for directing air flow from the heat sink 150 to the outlet 104.
  • Projections 170A, G70B extend from the top portion 42A (FIG. 5) and the bottom portion 42B (FIG. 6).
  • the fan 154 is positioned between (i.e., sandwiched between) the projections 170A, 170B to he secured within the housing 18.
  • the illustrated fan 154 is a multi-speed fan operable to rotate at more than one speed and directs air flow from the inlet 96 through the housing 18 and to the outlet 104.
  • the speed at which the fan 154 rotates may be determined based on a temperature of one or more of the charger electronics 34, the heat sink 150, a supported battery 14 A, 14B, etc.
  • the temperature sensor 830 is configured to measure the temperature and transmit a signal output to the microcontroller for determining the temperature of the charger 10. Subsequently, die microcontroller controls the speed of the fan 154 based on the temperature (e.g., of the heat sink 150, as illustrated).
  • the fan 154 generates an air flow of between 13.6 m 3 /hour and 25.5 m 3 /hour.
  • the top portion 42A of the housing 18 includes a plurality of wall members 176 extending from an inner surface 180.
  • the wall members 176 are integral with the top portion 42A and are configured to form a fluid diverter within the housing 18.
  • the diverter may direct air (FIG. 6) from the inlet 96 over the charger electronics 34 (e.g., the circuit board 140) to the heat sink 150.
  • the diverter is configured to create turbulent fluid flow' and may, therefore, increase air flow through the housing 18 and/or facilitate dissipation of heat from the housing 18.
  • the bottom portion 42B may also include similar integral wall members or diverters for further directing air flow through the housing 18.
  • the wall members 176 may further extend through the circuit board 140 for directing air flow through the circuit board 140 and through the housing 18.
  • the charger 10 defines a flow' path A (i.e., linear arrow's) through the housing 18.
  • air flows along the flow' path A from the inlet 96, over the charger electronics 34 (e.g., the circuit board 140) to the inlet of the heat sink 150, and through the heat sink 150 to the outlet 104.
  • the fan 154 directs air flow along the flow path A. Furthermore, the fan 154 directs air flow into the inlet and out of the outlet of each tube 162. The air flow' operates to dissipate heat generated by the charger electroni cs 34 from the housing 18.
  • the fan 154 may be operated in reverse such that the flow path A through the housing 18 is reversed, the inlet(s) become outlet(s), and the outlet(s) become inlet(s). See also, for example, FIG. 14, which illustrates a reversed airflow path.
  • air e.g., curvilinear lines
  • air flows from the inlet 96 to the outlet 104 through the housing 18.
  • air flow's from the inlet 96, over the charger electronics 34, and through the heat sink 150 to the outlet 104.
  • the inlet 96, the heat sink 150, and the outlet 104 are positioned to direct the air along this flow' path for dissipating the heat generated by the charger 10.
  • the charger 10 may further define a second flow' path in fluid communication with the second inlet 110. Specifically, air flow's into the bottom of the housing 18 through the second inlet 110 and past components of the charger electronics 34 positioned on the bottom side 1 18 of the circuit board 140. The air flow in the second flow' path may be combined with air flow in the first flow' path from the first inlet 96 to exit the outlet 104 As such, air flow' within the housing 18 may be separated along at least a portion of the flow' paths through the housing 18. Additionally, as previously noted, in some embodiments of the charger 10, the fan 154 may be operated in reverse such that air flow paths illustrated in FIG. 9 are generally reversed, the inlet(s) become outlet(s), and the outlet(s) become inlet(s).
  • the circuit board 140 may further include a heat sink or copper (not shown) extending from a top side 184 through the circuit board 140 to the bottom side 1 18 to dissipate heat generated by any of the components of the charger electronics 34 to the bottom side 118. Air entering the housing 18 through the second inlet 1 10 is configured to flow past the bottom side 118 to further facilitate dissipation of heat of the charger electronics 34 from the housing 18.
  • a heat sink or copper not shown
  • the heat sink 150 may include a slot (not shown) proximate one or some of the components of the charger electronics 34, such as, for example, the transformer 144.
  • the slot may be configured to direct a portion of air flowing through the heat sink 150 over a specific component (e.g., the transformer 144) on the circuit board 140.
  • a specific component e.g., the transformer 144
  • the slot may be positioned such that the air flow is directed back through a portion of the heat sink 150 after being directed over a specific component. As such, air may flow at least partially through the heat sink 150 more than once.
  • the charger 10 includes a plurality of light pipe assemblies 190 (e.g., two light pipe assemblies 190A, 190B), each extending to the opening 130A, 130B defined by the top portion 42A.
  • the light pipe assemblies 190.4, I 90B form the light source for each indicator.
  • Tire light pipe assemblies 190A, 190B are in heat transfer relationship ((e.g., mounted onto and in contact) with the heat sink 150 for transferring heat generated by the light pipe assemblies 190A, 190B to the heat sink 150.
  • the light pipe assemblies 190A, 190B are connected to the charger electronics 34 for controlling illumination of the light pipes 190 A, 190B. More specifically, one end of the respective light pipe 190A, 190B is optically connected to a respective light emitting diode (LED) positioned on tire circuit board 140, and an opposite end of the respective light pipe 190A, 190B is positioned adjacent the respective lens 134 (FIG. 1) to illuminate the lens 134. The LEDs are controlled by the charger electronics 34.
  • the illustrated light pipes of the respective light pipe assemblies 190A, 190B are formed by optical fibers. As such, the light pipe assemblies 190A, 190B are examples of the indicators 825 controlled by the microcontroller 810 (see, e.g , FIG.
  • the indicator of the first supporting section 64A may be operated when the first battery 14A is electrically connected to the charger terminals 74 of the first supporting section 64A.
  • the indicators 825 may be configured to indicate to a user when the respective batteries 14 A, I4B are connected and charging.
  • the indicator at least includes a light pipe of the respective light pipe assembly 190A, 190.
  • one or both of the batteries 14A, 14B are coupled to the respective battery support structure 22A, 22B (e.g., the supporting sections 64A, 64B) for charging.
  • the first set of terminals 74 electrically connect with the battery terminals of the first battery 14 A
  • the second set of terminals 92 electrically connect with the battery terminals of the second battery 14B.
  • the charger 10 supplies charging current to tire first and/or second battery 14A, 14B.
  • Each indicator 825 indicates to the user the charging operation for the associated battery 14 A, 14B (e.g., completion of charging (i.e., when the charging current is zero Amps (0 A), w'hen charging is in-process, when a charging error/fault occurs).
  • the fan 154 is a multi-speed fan.
  • the microcontroller 810 determines the charger temperature (e.g., of the heat sink(s) 150, the charger electronics 34, etc.) using the temperature sensor 830 and, when the temperature reaches or exceeds a threshold, activates the fan 154 to operate at a corresponding fan speed. For example, when the microcontroller 810 detects a temperature above a first threshold, then the fan 154 is activated at a first speed or percentage of maximum speed (e.g., about 50% speed).
  • the fan 154 may be activated at a different speed (e.g., more than 50% (100%, 75%, etc.) or less than 50% (25%, 10%, etc.)). Also, tire speed of the fan 154 may be based on the sensed temperature (e.g., higher for a higher temperature or lower for a low'er temperature) and/or a duration the sensed temperature exceeds a threshold (e.g., higher for a longer duration or lower for a shorter duration).
  • tire speed of the fan 154 may be based on the sensed temperature (e.g., higher for a higher temperature or lower for a low'er temperature) and/or a duration the sensed temperature exceeds a threshold (e.g., higher for a longer duration or lower for a shorter duration).
  • the fan 154 when the microcontroller 810 detects a temperature above a first threshold, then the fan 154 is activated at a first speed or percentage of maximum speed (e.g., about 50% speed), when the microcontroller 810 detects a temperature above a second (higher) threshold, then the fan 154 is activated at a second (higher) speed or percentage of maximum speed (e.g., about 75% speed), and so on until maximum fan speed is reached.
  • the microcontroller 810 may- increase the speed of the fan 154 by X% (e.g., about an additional 10%), and the loop starts over (i.e., measuring the battery temperature and the charger temperature).
  • the speed of the fan 154 may be increased by a different amount (e.g., 5%, 15%, 25%, etc.)). Also, the increase in the speed of the fan 154 may be based on the sensed temperature and/or duration the sensed temperature exceeds a threshold.
  • the microcontroller 810 may determine the charging current output of the charger 10. When the charging current output is not 0 A, then the microcontroller 810 may reduce the charge current by X% (e.g., about 10%), and the loop may start over (i.e. measuring the batter ⁇ ' temperature and the charger temperature). It should be understood that, in other embodiments, the charge current may be reduced by a different amount (e.g., 5%, 15%, 25%, 50%, etc.)). Also, the reduction in the charge current may be based on the sensed temperature and/or duration the sensed temperature exceeds a threshold.
  • X% e.g., about 10%
  • the loop may start over (i.e. measuring the batter ⁇ ' temperature and the charger temperature). It should be understood that, in other embodiments, the charge current may be reduced by a different amount (e.g., 5%, 15%, 25%, 50%, etc.)). Also, the reduction in the charge current may be based on the sensed temperature and/or duration the sensed temperature exceeds a threshold.
  • the microcontroller 810 determines the charger temperature and controls the speed of the fan 154 regardless of whether either of the batteries 14A, 14B is coupled to the charger 10.
  • the microcontroller deactivates the fan 154 in response to determining that the sensed temperature is below a threshold (e.g., a lower limit of the charger 10), rather than, for example, determining that one or both of the batteries 14A, 14B are disconnected.
  • a threshold e.g., a lower limit of the charger 10
  • the microcontroller 810 controls the fan 154 to cause air flow through the housing 42 and adjusts the fan speed of the fan 154 based on the temperature of the battery charger 10 (i) while one or both of the batteries 14A, 14B is coupled to the charger 10 for charging and (ii) while no batteries are coupled to the charger 10 for charging (i.e., when both batteries 14A, 14B are disconnected from the charger 10).
  • FIGS. 11 -12B illustrate another alternative construction of a batten ' charger 210, with like components and features as the embodiment of the batter ⁇ ' charger 10 shown in FIGS. 2-10B being labeled with like reference numbers plus“200/’
  • the battery charger 210 is similar to the charger 10 and, accordingly, tire discussion of the batter - charger 10 above similarly applies to the batter ⁇ - charger 210 and is not re-stated. Rather, only differences between the battery- charger 10 and battery' charger 210 are specifically noted herein, such as differences in the heat sink assembly. Additionally, the diagram 800 of FIG. 8 A and the flow chart of FIG. 8B similarly apply to the batery charger 200.
  • the batter ⁇ charger 210 includes a housing 218 having a top portion (not shown) and an opposite bottom portion 242B coupled to the top portion.
  • the top portion while not shown, is similar to the top portion 42A of the charger 10 (see FIG. 1).
  • the battery charger 210 further includes charger electronics 234 and a heat dissipating structure 238. Air flow is configured to flow though the housing 218 for dissipating heat generated by the charger 210. In particular, arr flow flows through the housing 218 from an arr inlet 296 to an air outlet 304.
  • the charger electronics 234 are supported by the bottom portion 242B.
  • the charger electronics 234 are operable to output a charging current to one or both of batteries (e.g , batteries 14A, 14B of the first embodiment of FIGS. 2-10B) connected to the battery charger 210 for charging of the batteries.
  • the charger electronics 234 include, among other tilings, a circuit board 340, a transformer 344, and the charger microcontroller 810 (not labeled) on the circuit board 340.
  • the batery charger 210 further includes a heat sink assembly 348 and a fan 354 to provide the heat dissipating structure 238.
  • the temperature sensor 830 may be disposed in the housing 218 and positioned near the charger electronics 234 (e.g., near the component(s) generating the most heat (e.g., the CPU, the transformer 344, field effect transistors (FETs), etc.)) or the heat sink assembly 348.
  • the heat sink assembly 348 is disposed in the housing 218 proximate a back 254 of the housing 218. In other constructions (not shown), the heat sink assembly 348 may be positioned at other locations in the housing 218.
  • the heat sink assembly 348 is in heat transfer relationship with components of the charger electronics 234.
  • the heat sink assembly 348 is mounted onto and in contact with the circuit board 340 and components on the circuit board (e.g., the microcontroller 810, the transformer 344, FETs, etc.) may be in direct physical contact with the heat sink assembly 348.
  • the heat sink assembly 348 includes a first heat sink portion 350A and a second heat sink portion 350B spaced away from the first heat sink portion 350A (collectively, the heat sink 350).
  • each heat sink portion 350A, 350B includes a first section 351 and a second section 352 coupled to the first section 351.
  • the second section 352 is perpendicular to the first section 351 such that each heat sink portion 350A, 350B has an“L” shaped cross-section (FIGS. 12A and 12B).
  • the second section 352 may extend at an angle relative to the first section 351 (e.g., 80 degrees, 70 degrees, etc.).
  • a size (e.g., length, width, etc.) of the heat sink portions 350A, 350B, or the first and second sections 351 , 352 themselves, may be the same or different.
  • the first and second heat sink portions 350A, 350B are about the same size.
  • a first section 351’ of a first heat sink portion 350A’ has a length that is smaller than a length of a second section 3525 of tire first heat sink portion 350A’ (see FIG. 13B), but first and second sections 35 G, 352, respectively, of a second heat sink portion 150B’ have the same length (see FIG. 13A).
  • Each heat sink portion 350A, 350B is coupled to the circuit board 340.
  • the second section 352 is secured to a top surface of the circuit board 340. Further, the first heat sink portion 350A is positioned closer to the fan 354 than the second heat sink portion 350B.
  • the illustrated fan 354 is positioned between an end 358 of the heat sink 350 (i.e., the first heat sink portion 350A) and the inlet 296. Similar to the fan 154 of the first embodiment, the fan 354 is a multi-speed fan operable to rotate at more than one speed and directs air flow' from the inlet 296 through the housing 218 and to the outlet 304.
  • the fan 354 is controlled by the microcontroller 810 in a similar manner as tire fan 154 (see, e.g., the flow chart of FIG. 8B). In some embodiments, at full speed, the fan 354 generates an air flow of between 13 6 m 3 /hour and 25 5 m 3 /hour. However, in this embodiment, a rotation of the fan 354 may be reversed such that the inlet 296 is positioned on a side 256 of the housing 218 and the outlet 304 is positioned on a front.
  • FIGS. 14-16 illustrate yet another alternative construction of a battery charger 410, with like components and features as the embodiment of the battery charger 10 shown in FIGS. 2-10B being labeled with like reference numbers plus“400.”
  • the batter) ' charger 410 is similar to the charger 10 and, accordingly, the discussion of the battery charger 10 above similarly applies to the battery charger 410 and is not re-stated. Rather, only differences between the battery charger 10 and battery ' charger 410 are specifically noted herein, such as differences in the heat sink assembly. Additionally, the diagram 800 of FIG. 8 A and the flow chart of FIG. 8B similarly apply to the battery' charger 400.
  • the battery charger 410 includes a housing 418 having a top portion (not shown) and an opposite bottom portion 442B coupled to the top portion.
  • the top portion while not shown, is similar to the top portion 42A of the charger 10 (see FIG. 1).
  • the battery charger 410 further includes charger electronics 434 and a heat dissipating structure 438. Air flow is configured to flow though the housing 418 for dissipating heat generated by the charger 410. In particular, air flow 7 flows through the housing 418 from an air inlet 496 to an air outlet 504.
  • the charger electronics 434 are supported by the bottom portion 442B.
  • the charger electronics 434 are operable to output a charging current to one or both of bateries (e.g., batteries 14A, 14B of the first embodiment of FIGS. 2-10B) connected to the batery charger 410 for charging of the batteries.
  • Tire charger electronics 434 include, among other things, a circuit board 540, a transformer 544, and the charger microcontroller 810 (not labeled) on the circuit board 540.
  • the battery charger 410 further includes a heat sink assembly 548 and a fan 554 to provide the heat dissipating structure 438.
  • the temperature sensor 830 may be disposed in the housing 418 and positioned near the charger electronics 434 (e.g., near the component(s) generating the most heat (e.g., die CPU, the transformer 544, field effect transistors (FETs), etc.)) or the heat sink assembly 548.
  • the heat sink assembly 548 is disposed in the housing 418 proximate a back 454 of the housing 418. In other constructions (not shown), the heat sink assembly 548 may be positioned at other locations in the housing 418.
  • the heat sink assembly 548 is in heat transfer relationship with components of the charger electronics 434.
  • the heat sink assembly 548 is mounted onto and in contact with the circuit board 540 and components on the circuit board 540 (e.g., the microcontroller 810, the transformer 544, FETs, etc.) may be in direct physical contact with the heat sink assembly 548.
  • the heat sink assembly 548 includes a first heat sink portion 550A and a second heat sink portion 550B spaced away from the first heat sink portion 550A (collectively, the heat sink 550).
  • each heat sink portion 550A, 550B includes a first section 551, a second section 552, and a third section 553 extending between the first and second sections 551, 552.
  • each of the first and second sections 551, 552 are coupled a respective end of the third section 553 by a bend.
  • the first and second sections 551 , 552 are substantially perpendicular to the third section 553 such that each heat sink portion 550A, 550B has an“S” shaped cross- section (FIGS. 17B and 18B, respectively).
  • the first and second sections 551, 552 may extend at an angle relative to the third section 553 (e.g., 80 degrees, 70 degrees, etc.).
  • a size (e.g., length, width, etc.) of the heat sink portions 550A, 550B, or the first, second, and third sections 551, 552, 553 themselves, may be the same or different.
  • the second section 552 is separated to form feet of the respective heat sink portion 550A, 550B.
  • a length of the first heat sink portion 550A (FIG. 17 A) is smaller than a length of the second heat sink portion 550B (FIG. 18A).
  • the first section 551 of the first heat sink portion 550A has a length that is larger than a length of the first section 551 of the second heat sink portion 550B. More specifically, the length of the first section 551 is about half of a total length of the first section 551 of the second heat sink portion 550B. Still further, in another example, a width of the sections 551, 552, 553 of the first or second heat sink portions 550.4, 550B may vary. For example, as shown in FIGS. 17B-17C or FIGS. 18B-18C, the width of the first section 551 of the respective heat sink portion 550A, 550B is smaller than a width of a first section 55 G of a respective heat sink portion 550A’, 550B.
  • Each heat sink portion 550A, 550B is coupled to the circuit board 540.
  • the second section 552 is secured to a top surface of the circuit board 540. Further, the first heat sink portion 550A is positioned closer to the fan 554 than the second heat sink portion 550B.
  • the illustrated fan 554 is positioned between an end 558 of the heat sink 550 (i.e., the first heat sink portion 550A) and the inlet 496. Similar to the fan 154 of the first embodiment, the fan 554 is a multi-speed fan operable to rotate at more than one speed and directs air flow from the inlet 496 through the housing 418 and to the outlet 504. The fan 554 is controlled by the microcontroller 810 in a similar manner as the fan 154 (see, e.g., the flow chart of FIG. 8B). In some embodiments, at full speed, the fan 554 generates an air flow' of between 13.6 m 3 /hour and 25.5 m 3 /hour.
  • a rotation of the fan 554 may be reversed such that the inlet 496 is positioned on a side 456 of the housing 418 and the outlet 504 is positioned on a front.
  • the fan 554 directs the air flow along the flow path B (i.e., linear arrows). Accordingly, a portion of the air flow entering the battery charger 410 is configured to flow from the air inlet 496 past the heat sink 550 and over the charger electronics 534, before exiting at the outlet 504, or may flow past only one of the heat sink portions 550A, 550, or not flow past any of the heat sink portions 550A, 550 before flowing over the charger electronics 534 to the outlet 504
  • the charger 410 of FIGS. 14-16 includes a plurality of light pipe assemblies 555 (e.g., two light pipes 555 A, 555B), each extending to the opening 130A,
  • the light pipes 555A, 555B form the light source for each indicator.
  • the light pipes 555A, 555B are connected to the charger electronics 434 for controlling illumination of the light pipes 555A, 555B. More specifically, one end of the respective light pipe 555A, 555B is optically connected to a respective light emitting diode (LED) positioned on the circuit board 540, and an opposite end of the respective light pipe 555A, 555B is positioned adjacent the respective lens 134 (FIG 1) to illuminate the lens 134.
  • LED light emitting diode
  • the light pipes 555A, 555B have a wedge shape such that the end positioned near the circuit board 540 has a narrower width than the end positioned adjacent the respective lens 134.
  • the light pipes 555 A, 555B are formed from a transparent or translucent, rigid plastic material.
  • the LEDs are controlled by the charger electronics 34 similar to the light pipe assemblies 190A, 190B.
  • the battery chargers 210, 410 may include oilier features as described with respect to the first embodiment of the battery charger 10, such as the diverter (wall members 176), and light pipes forming a light source for each indicator of the battery charger 210, 410.
  • each of tire inlets and outlets of the various chargers described herein may be referred to generally as an air port, and rnay be referred to as an inlet and outlet, depending on the fan rotation direction and resulting direction of airflow through the inlet (or outlet).
  • a battery charger 10, 210, 410 are described herein that are operable to charge different types of batteries 14A, 14B at the same time, and a method for dissipating heat regardless of whether the batteries 14A, 14B are coupled to the charger 10, 210, 410.
  • the charger 10, 210, 410 rnay include structure (e.g., a diverter) integral with and positioned within the housing 18, 218, 418 and operable to direct air flow from the inlet 96, 296, 496 through the housing 18, 218, 418 to the outlet 104, 304, 504.
  • the inlet 96, 296, 496 and the outlet 104, 304, 504 may be defined by adjacent sides (e.g., the front and the side) or on opposite sides (e.g., the front and the back).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Cette invention concerne un chargeur de batterie, comprenant un boîtier ayant une structure de support pour supporter simultanément au moins deux batteries de différents types à charger, comprenant une première batterie d'un premier type et une seconde batterie d'un second type. Le chargeur de batterie comprend en outre un circuit électronique de chargeur supporté par le boîtier et activable pour délivrer un courant de charge pour charger la première batterie et un courant de charge pour charger la seconde batterie. Un ventilateur peut fonctionner pour provoquer un écoulement d'air à travers le boîtier. Une vitesse de ventilateur du ventilateur est réglable sur la base d'une température du chargeur de batterie (i) lorsque au moins l'une des au moins deux batteries est couplée au chargeur de batterie pour la charge et (ii) lorsque aucune batterie n'est couplée au chargeur de batterie pour la charge.
PCT/US2019/043845 2018-07-30 2019-07-29 Chargeur de batterie WO2020028212A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU2019314293A AU2019314293B2 (en) 2018-07-30 2019-07-29 Battery charger
CN201980050957.8A CN112514197A (zh) 2018-07-30 2019-07-29 电池充电器
EP19844766.6A EP3830925A4 (fr) 2018-07-30 2019-07-29 Chargeur de batterie
AU2022203040A AU2022203040B2 (en) 2018-07-30 2022-05-05 Battery charger
AU2023203101A AU2023203101B2 (en) 2018-07-30 2023-05-17 Battery charger

Applications Claiming Priority (2)

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US201862711926P 2018-07-30 2018-07-30
US62/711,926 2018-07-30

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US (1) US11540429B2 (fr)
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CN (1) CN112514197A (fr)
AU (3) AU2019314293B2 (fr)
TW (1) TWM604073U (fr)
WO (1) WO2020028212A1 (fr)

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CN210120406U (zh) 2018-10-17 2020-02-28 米沃奇电动工具公司 电池充电器
US11898734B2 (en) 2019-09-17 2024-02-13 Milwaukee Electric Tool Corporation Heat sink
USD965515S1 (en) 2020-09-18 2022-10-04 Ariens Company Battery charger
US20220094187A1 (en) * 2020-09-21 2022-03-24 Milwaukee Electric Tool Corporation Gang box charging
JP7504785B2 (ja) * 2020-12-25 2024-06-24 株式会社マキタ 充電器
WO2022160186A1 (fr) * 2021-01-28 2022-08-04 宁德时代新能源科技股份有限公司 Procédé de charge et dispositif de conversion de puissance
TW202240497A (zh) * 2021-03-31 2022-10-16 姚立和 電力交易裝置及應用彼之電動設備

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US20200037474A1 (en) 2020-01-30
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